Hack#48

DoubleAbs.java

package org.hadoophacks.pig2;

import org.apache.pig.EvalFunc;
import org.apache.pig.data.Tuple;
import org.apache.pig.data.DataType;
import org.apache.pig.backend.executionengine.ExecException;
import org.apache.pig.impl.logicalLayer.schema.Schema;
import org.apache.pig.impl.logicalLayer.FrontendException;
import java.io.IOException;
import java.util.List;
import java.util.ArrayList;
import org.apache.pig.FuncSpec;


public class DoubleAbs extends EvalFunc<Double>{
    
    public Double exec(Tuple input)throws IOException{
	
	if(input == null || input.size() == 0){
	    return null;
	}
	
	try{
	    Double value = (Double)input.get(0);
	    return Math.abs(value);
	}catch(ExecException e){
	    throw new IOException(e);
	}
    }
}